Patents by Inventor Akira Yamanashi

Akira Yamanashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Data storage system
    Patent number: 7046470
    Abstract: The information storage apparatus has an internal structure and arrangement of fans in consideration of the cooling effect. The capacity of the entire apparatus can be smaller than that of a conventional apparatus and an optimum air channel can be formed so as to maintain reliability of performance, life and the like of components at high temperatures. Further, relatively speaking, a module which does not produce a large amount of heat and does not require cooling is provided in a front stage of the channel while a module including heat-producing components and a cooling fan is provided in a rear stage of the channel.
    Type: Grant
    Filed: February 23, 2004
    Date of Patent: May 16, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamanashi, Hirokazu Takahashi, Takamasa Ishikawa, Kenichi Tateyama
  • Load balancing storage system
    Patent number: 6993625
    Abstract: A disk storage subsystem allocating an equivalent number of hard disk drives to each loop, alternately connecting the connecting bays of hard disk drives to optical fiber channels provided with two or more fiber channel loops for optimizing load balancing.
    Type: Grant
    Filed: November 14, 2003
    Date of Patent: January 31, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Ogawa, Akira Yamanashi, Kenichi Tateyama, Kenichi Takamoto
  • Data storage system
    Publication number: 20040160720
    Abstract: An information storage apparatus having internal structure and arrangement of fans in consideration of cooling effect, thereby the capacity of the entire apparatus can be smaller than that of conventional apparatus, and an optimum air channel can be formed so as to prevent damage to reliability of performance, life and the like of components at high temperatures. For a module with reliability of life or the like to be ensured or a module including a part influenced by performance such as information processing speed, provided is an arrangement where outside air is directly forwarded to the module. Further, a module which does not produce much amount of heat and does not require cooling is provided in a comparatively front stage of the channel, a module including heat-producing components and a cooling fan is provided in a comparatively rear stage of the channel.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamanashi, Hirokazu Takahashi, Takamasa Ishikawa, Kenichi Tateyama
  • Load balancing storage system
    Patent number: 6763438
    Abstract: A disk storage subsystem allocating an equivalent number of hard disk drives to each loop, alternately connecting the connecting bays of hard disk drives to optical fiber channels provided with two or more fiber channel loops for optimizing load balancing.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: July 13, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Ogawa, Akira Yamanashi, Kenichi Tateyama, Kenichi Takamoto
  • Load balancing storage system
    Publication number: 20040098524
    Abstract: A disk storage subsystem allocating an equivalent number of hard disk drives to each loop, alternately connecting the connecting bays of hard disk drives to optical fiber channels provided with two or more fiber channel loops for optimizing load balancing.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 20, 2004
    Inventors: Hideo Ogawa, Akira Yamanashi, Kenichi Tateyama, Kenichi Takamoto
  • Load balancing storage system
    Publication number: 20020010834
    Abstract: A disk storage subsystem allocating equivalent number of hard disk drives to each loop, alternately connecting the connecting bays of hard disk drives to fiber channels providing with two or more fiber channel loops for optimizing load balancing.
    Type: Application
    Filed: September 12, 2001
    Publication date: January 24, 2002
    Inventors: Hideo Ogawa, Akira Yamanashi, Kenichi Tateyama, Kenichi Takamoto
  • Data storage system
    Publication number: 20010046118
    Abstract: An information storage apparatus having internal structure and arrangement of fans in consideration of cooling effect, thereby the capacity of the entire apparatus can be smaller than that of conventional apparatus, and an optimum air channel can be formed so as to prevent damage to reliability of performance, life and the like of components at high temperatures. For a module with reliability of life or the like to be ensured or a module including a part influenced by performance such as information processing speed, provided is an arrangement where outside air is directly forwarded to the module. Further, a module which does not produce much amount of heat and does not require cooling is provided in a comparatively front stage of the channel, a module including heat-producing components and a cooling fan is provided in a comparatively rear stage of the channel.
    Type: Application
    Filed: January 18, 2001
    Publication date: November 29, 2001
    Inventors: Akira Yamanashi, Hirokazu Takahashi, Takamasa Ishikawa, Kenichi Tateyama